ΔE 9.5, close: similar, with a visible difference side by side. Brown is a little darker, warmer than Berserker Bloodshade. They are different kinds of paint: Citadel Berserker Bloodshade is a wash/shade and Green Stuff World Brown is an ink, glaze or transparent paint, so they won’t behave the same on the model even where the colour is close.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Brown is a little darker, warmer than Berserker Bloodshade. They are different kinds of paint.
The same difference applies the other way round: Berserker Bloodshade is a little lighter, cooler.
ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.
See Berserker Bloodshade on the colour wheel See Brown on the colour wheel
All matches: Berserker Bloodshade equivalents · Brown equivalents